Metering piston pump with piston-carried distributor for viscous

Details Metering piston pump with piston-carried distributor for viscous Metering piston pump with piston-carried distributor for viscous

1975-08-07

1977-09-13

Croyle, Carlton R.

Pumps

Expansible chamber type

Control by withdrawal or tilting of pump piston relative to...

417511, 417900, 222383, F04B 704, F04B 3910, F04B 1502

Patent

active

040478548

ABSTRACT:
A material dispensing and metering piston pump comprising, in combination, a piston cylinder, an inlet defined in said cylinder for material to be dispensed, and an outlet defined in said cylinder for the said material, the inlet and the outlet being axially spaced from one another, and a piston comprising a piston rod and a piston head, the piston head comprising a member having a peripheral skirt outwardly and forwardly projecting therefrom, said member having one or more apertures extending there-through, there being a sealing member mounted on said piston rod, said member and said sealing member being movable relative to one another, said sealing member acting to seal said apertures when said member with said peripheral skirt and said sealing member are in one relative terminal position, the arrangement being such that the member and sealing member co-operate to seal said apertures when the piston head assembly moves material towards said outlet and to open said apertures when the piston head is withdrawn from said cylinder.

REFERENCES:
patent: 1336187 (1920-04-01), Barr
patent: 1798209 (1931-03-01), Lambert
patent: 2384824 (1945-09-01), Eitner
patent: 2464030 (1949-03-01), Engstrom
patent: 2531705 (1950-11-01), Schultz
patent: 2569903 (1951-10-01), Santarelli
patent: 3153385 (1964-10-01), Baron-Bowen
patent: 3802805 (1974-04-01), Roeser

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